DEVELOPMENT FOR NEW SCRAP-IRON MELTING PROCESS SUPPRESSING EXHAUST CARBON DIOXIDE

开发抑制废气二氧化碳排放的新型废铁熔炼工艺

• 批准号: 07555536
• 负责人: YAGI Jun-ichiro
• 金额: $ 3.52万
• 依托单位: TOHOKU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07555536/
• 关键词: Oxidized scrap-iron; Coke packed bed; Melting furnace; Curbrization; Melting temperature; Scrap-iron melting; Mathematical model; Numerical simulation; 鉄スクラップ; 浸炭速度; CO-CO_2混合ガス; 融点降下; 解離吸着; 高温顕微鏡観察; 炭酸ガス排出抑制; リサイクリング; 充填層プロセス; 炭材内装ブリケット

On the basis of the results obtained from researches for blast furnace, sludge melting furnace and high frequency melting furnace, the research on the melting furnace of oxidized scrap-iron was carried out for coke bed reactor.Briquetting method included carbon materials was adopted for the reduction of oxidized scrap-iron, and reduction kinetics of briquette was measured. Various phenomena such as gas flow, solid flow and melting of solid in the coke-bed shaft furnace were examined by the fundamental experiments. Then, mathematical model of the melting furnace was constructed with considering some chemical reactions such as combution of coke, gasification of coke and curbrization of solid iron, and optimum operating condition were investigated by numerical calculation.The results obtained summarized as follows ;1) Formulation of the reduction rate of briquette. 2) Measurement of curbrization rate from reducing gas to solid iron. 3) Measurement of melting temperature for curbrized iron. 4) Measurement of carburization rate from solid carbon to solid iron. 5) Numericcal simulation of scrap-iron melting furnace.

在总结高炉、污泥熔化炉和高频熔化炉研究成果的基础上，对焦炭床反应器进行了氧化铁屑熔化炉的研究，采用含碳材料的压块法还原氧化铁屑，并测定了还原动力学。通过基础实验研究了竖炉内气体流动、固体流动和固体熔化等现象。在此基础上，考虑焦炭的燃烧、气化和固体铁的硫化等化学反应，建立了熔炼炉的数学模型，并通过数值计算对熔炼炉的最佳操作条件进行了研究。2)还原气体向固体铁的硬化率的测定。3)球墨铸铁熔化温度的测定。4)从固体碳到固体铁的渗碳速度的测量。5)废钢熔化炉的数值模拟。

项目成果

J.Yagi et.al.: "Numerical Analysis of a Moving Bed Reactor for Iron Scrap Melting" THe Minerals,Metals & Materials Society.Proceeding of THe Julian Szekely Memorial Symposium on Material Processing. 83-100 (1997)

J.Yagi 等人：“用于铁废料熔化的移动床反应器的数值分析”矿物，金属

X.Zhang, R.Takahashi & J.Yagi: "Reaction Rates of Oxidized Iron-Scrap Briquette with Pulverized Coke in Nitrogen Atmosphere" Tetsu-to-Hagane. Vol.81 No.11. 1043-1048 (1995)

张X、高桥R

J.Yagi et.al.: "Fluid Flow and Heat Transfer Analysis of Iron Scrap Melting in a Coke Moving Bed" The Fifth Asian Conference on Fluidized-Bed and Three-Phase Peactors. 394-399 (1997)

J.Yagi 等人：“焦炭移动床中废铁熔化的流体流动和传热分析”第五届亚洲流化床和三相反应器会议。

張 興和, 他: "CO-CO2雰囲気下における固体鉄への浸炭速度" 鉄と鋼. 83・5. 229-304 (1997)

Xinghe Zhang等人：“CO-CO2气氛下的固体铁的渗碳速度” Tetsu to Hagane 83・5 (1997)。

M.Niu et al: "Reduction of the Wall Effect in a Packed Bed by a Hemispherical Lining" AlChE J.42・4. 1181-1186 (1996)

M.Niu 等人：“半球形衬里减少填充床中的壁效应”AlChE J.42·4 (1996)。